Undersheriff Dennis Vrooman

US Vrooman

Dennis Vrooman began his career with the Downey Police Department in 1984 first as a non-sworn Police Aide, assigned to the jail, dispatch and the evidence room; then in 1988 as a Police Officer after graduating the Los Angeles County Sheriff’s Academy (Class 242).  While at Downey Police Department he was assigned to patrol and served as a Field Training Officer (FTO), Explorer Advisor and Chaplain Advisor. 

In 1992, Dennis was hired as one of the original members of the Murrieta Police Department.  At the Police Officer rank, Dennis was assigned to patrol, and was an FTO.  In 1996, he was selected to serve on the Murrieta/Temecula Special Enforcement Team, then the Riverside Sheriff’s SIB Southwest Corridor Narcotics Task Force.  In 1999, he was promoted to Corporal and was assigned to the Detective Bureau.  During these past assignments, Dennis was a Drug Recognition Expert (DRE) and Instructor, and had collateral assignments as a DARE Officer and a SWAT Operator. 

In 2001, Dennis was promoted to Sergeant and was reassigned to patrol, then administration, before he was selected to simultaneously supervise both the Special Enforcement Team and the School Resource Officer teams for three years.  In 2006 he was promoted to Lieutenant and reassigned to patrol, then the Detective Bureau in 2010.  In 2011, Dennis was promoted to the rank of Captain and oversaw the Operations Division, which included Patrol and Traffic.  In 2013 he was the commander of the Support Division, which included the Detective, Records, Dispatch and Code Enforcement Bureaus, as well as coordinating personnel recruitment, and managing a nation-wide task force.   He was re-assigned to back to command the Operations Division in 2017. 

Throughout these supervisory and management ranks he served as the Public Information Officer (PIO) for the department and started several community-based programs, including the Every 15 Minutes program at the local high schools, and National Night Out.  He has experience in budgeting, including the implementation and management of several capital and technology projects.  More recently, he was the project manager during the migration of the Murrieta Police Department to the County’s PSEC regional radio system, as well the implementation of a Computer Aided Dispatch/Records Management System.  

Dennis honorably “retired” from the Murrieta Police Department on January 3, 2019.  He was sworn in by Sheriff Chad Bianco as an Assistant Sheriff with the Riverside County Sheriff’s Department on January 7, 2019 and was assigned to Administration, which oversees the Courts, Coroner, Public Administrator, Academy & Training, and the Accounting & Finance Divisions.  On December 19, 2019 he was appointed by Sheriff Bianco to the rank of Undersheriff. 

Throughout his career, Dennis has gained extensive experience on both sides of labor relations; both as an employee association board member for over two decades, as well as a representative on behalf of city/county management. 

Dennis holds a Bachelor’s degree in Liberal Arts from Regents College and a Master’s degree in Organizational Leadership from Azusa Pacific University.  He is a graduate of the Sherman Block Supervisory Leadership Institute (SLI) Class 187; the FBI National Academy, Session 242; and the Senior Management Institute for Policing (SMIP) Class 61. 

Dennis has taught law enforcement related classes throughout the region and state for the past two decades.  He currently serves on the board of directors for the SAFE Family Justice Centers of Riverside County. 

Dennis has been married for over 30 years and has three married adult children and four granddaughters.